How Big of a Backpack Can You Bring on Allegiant Airlines


When planning your low-cost flight with Allegiant Air, become acquainted with their clear baggage rules, particularly with regard to carry-on items. To ensure a pleasant journey, optimize your packing by complying with size and weight regulations for your carry-on backpack. Book Allegiant flights on the Booking Trolley for the most affordable options. For inquiries or assistance, contact Allegiant Air at +1-585-935-7101.

Carry-on Baggage: Size Matters

Allegiant Airlines allows one carry-on bag and one personal item per passenger. However, the dimensions of the carry-on bag must be strictly followed. Your carry-on bag should not be larger than:

  • Length: 22 inches (55 cm)
  • Width: 16 inches (40 cm)
  • Height: 10 inches (25 cm)

It’s worth noting that these dimensions include protruding features like wheels, pockets, and handles. Making sure your backpack meets these requirements will ensure a smooth travel through security and onto the airline.

Personal Item: Keeping it Compact

You may bring one personal item on board in addition to your carry-on backpack. Personal objects such as purses, briefcases, and, in this case, small backpacks are common examples. The personal item should fit comfortably under the seat in front of you and not exceed the measurements listed below:

  • Length: 18 inches (45 cm)
  • Width: 14 inches (35 cm)
  • Height: 8 inches (20 cm)

Choosing a compact and flexible backpack for your personal item will ensure you have your essentials within arm’s reach throughout the flight.

Choosing the Right Backpack: Meeting Allegiant’s Standards

To avoid any additional expenses or problems, it is essential to choose an acceptable backpack that meets Allegiant’s criteria. Here are some tips to ensure your backpack complies with Allegiant’s carry-on baggage requirements:

  1. Measure Your Backpack Accurately

Before purchasing a backpack, carefully measure it, taking into account not only the major measurements but also the wheels, pockets, and handles. Measurement accuracy is essential for assuring compliance with the airline’s requirements.

  1. Opt for Soft and Flexible Materials

Choose a backpack made of flexible, soft materials. These materials are easy to handle and can be crushed or squeezed more efficiently into the overhead bin.

  1. Consider a Collapsible Design

If possible, use a backpack that is flexible or folding. You may vary the size depending on the contents, making it easier to store under the seat or in the overhead bin.

Examples of Backpacks that Meet Allegiant’s Requirements

To give you a better idea, here are some examples of backpacks that align with Allegiant Airlines’ carry-on baggage requirements:

  • Jansport Superbreak Backpack
  • Herschel Little America Backpack
  • Patagonia Arbor Backpack
  • Osprey Daylite Plus Backpack
  • Timbuk2 Classic Messenger Bag

Oversized Backpacks: What to Do?

If your backpack exceeds the allowable size for carry-on baggage, there are a few options to consider:

  1. Gate Check Your Backpack

Your big backpack can be gate-checked, which means it will be stored in the aircraft’s cargo hold. This service is usually free, however, if your backpack weighs more than 50 pounds, you may be charged extra.

  1. Pay for Carry-On

You can also pay a charge to bring your big backpack on board as a carry-on item. Allegiant Airlines normally charges $50 for online pre-purchase and $65 for in-airport purchases.

Packing Your Backpack: Tips for Efficiency

Once you have the right-sized backpack, efficient packing is key. Here are some tips to optimize space and keep your backpack organized:

  1. Prioritize Essential Items

Pack only what you need to keep your bag light and easy to carry. Consider your destination as well as the length of your trip to find out what you absolutely require.

  1. Organize with Packing Cubes

Packing cubes can help you organize your belongings and save space. These cubes help to separate objects and provide simple access when needed.

  1. Strategic Packing

To keep the backpack stable, place the heaviest objects at the bottom. Arrange commonly used goods towards the top of the backpack for easy access without having to unload the entire backpack.

  1. Stay Hydrated

Bring a reusable water bottle to remain hydrated on your flight. Most backpacks feature specialized pockets for water bottles, allowing you to stay hydrated throughout your travel.


Understanding Allegiant Airlines’ carry-on baggage policy and selecting the appropriate-sized backpack is critical for a seamless and comfortable flying experience. Following the size restrictions and packing your backpack efficiently will not only save you money but will also ensure a smooth voyage. Choose an appropriate backpack, gather your essentials, and set off on your Allegiant journey stress-free!